A somewhat "controversial" topic in audio gear subjective reviewing is the reproduction of Pace/Rhythm/Timing, sometimes abbreviated PRaT. (Sometimes, PRAT with a cap. 'A' may denote A=acceleration). The topic also includes an interdependent subjective metric, dynamics.

Perhaps the seminal introduction to the phenomenon is the Nov. 1992 article in Stereophile, Pace, Rhythm, & Dynamics by Martin Colloms . I noted that this topic is "controversial" in that it not often reported in gear/equipment reviews -- especially in forum- or message-board-based reviews ... where most folks stick to the common (and, IMO, repetitive) BMTS (bass, mids, treble, soundstage). From there, some may additionally describe, e.g., a headphone's 'dynamic' or 'speed' qualities. But when asked to comment on PRaT, the same reviewer responds with puzzlement, smug ridicule, or ignorance.

Pace/Rhythm/Timing -- or PRaT -- is something I'm particularly sensitive too. It is one of the first attributes that I notice the presence or absence of in audio gear, like headphones, all else held equal. I even notice it in slow music, like adagio or lento movements (the Colloms article above goes into this a bit).